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<?php |
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namespace Backpack\CRUD\app\Models\Traits; |
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use DB; |
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use Illuminate\Database\Eloquent\Model; |
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use Illuminate\Support\Facades\Config; |
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use Traversable; |
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//use Backpack\CRUD\app\Models\Traits\HasIdentifiableAttribute; |
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trait CrudTrait |
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{ |
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use HasIdentifiableAttribute; |
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public static function hasCrudTrait() |
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{ |
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return true; |
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} |
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/* |
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|-------------------------------------------------------------------------- |
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| Methods for ENUM and SELECT crud fields. |
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|-------------------------------------------------------------------------- |
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*/ |
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public static function getPossibleEnumValues($field_name) |
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{ |
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$default_connection = Config::get('database.default'); |
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$table_prefix = Config::get('database.connections.'.$default_connection.'.prefix'); |
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$instance = new static(); // create an instance of the model to be able to get the table name |
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$connectionName = $instance->getConnectionName(); |
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$type = DB::connection($connectionName)->select(DB::raw('SHOW COLUMNS FROM `'.$table_prefix.$instance->getTable().'` WHERE Field = "'.$field_name.'"'))[0]->Type; |
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preg_match('/^enum\((.*)\)$/', $type, $matches); |
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$enum = []; |
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foreach (explode(',', $matches[1]) as $value) { |
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$enum[] = trim($value, "'"); |
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} |
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return $enum; |
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} |
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public static function getEnumValuesAsAssociativeArray($field_name) |
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{ |
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$instance = new static(); |
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$enum_values = $instance->getPossibleEnumValues($field_name); |
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$array = array_flip($enum_values); |
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foreach ($array as $key => $value) { |
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$array[$key] = $key; |
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} |
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return $array; |
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} |
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/** |
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* Register aditional types in doctrine schema manager for the current connection. |
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* |
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* @return DB |
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*/ |
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public function getConnectionWithExtraTypeMappings() |
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{ |
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$instance = new self; |
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$conn = DB::connection($instance->getConnectionName()); |
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// register the enum, json and jsonb column type, because Doctrine doesn't support it |
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$conn->getDoctrineSchemaManager()->getDatabasePlatform()->registerDoctrineTypeMapping('enum', 'string'); |
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$conn->getDoctrineSchemaManager()->getDatabasePlatform()->registerDoctrineTypeMapping('json', 'json_array'); |
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$conn->getDoctrineSchemaManager()->getDatabasePlatform()->registerDoctrineTypeMapping('jsonb', 'json_array'); |
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return $conn; |
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} |
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/** |
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* Get the model's table name, with the prefix added from the configuration file. |
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* |
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* @return string Table name with prefix |
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*/ |
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public function getTableWithPrefix() |
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{ |
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$prefix = Config::get('database.connections.'.$this->getConnectionName().'.prefix'); |
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$tableName = $this->getTable(); |
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return $prefix.$tableName; |
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} |
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/** |
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* Get the column type for a certain db column. |
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* |
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* @param string $columnName Name of the column in the db table. |
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* @return string Db column type. |
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*/ |
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public function getColumnType($columnName) |
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{ |
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$conn = $this->getConnectionWithExtraTypeMappings(); |
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$table = $this->getTableWithPrefix(); |
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return $conn->getSchemaBuilder()->getColumnType($table, $columnName); |
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} |
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/** |
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* Checks if the given column name is nullable. |
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* |
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* @param string $column_name The name of the db column. |
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* @return bool |
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*/ |
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public static function isColumnNullable($column_name) |
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{ |
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// create an instance of the model to be able to get the table name |
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$instance = new static(); |
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$conn = $instance->getConnectionWithExtraTypeMappings(); |
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$table = $instance->getTableWithPrefix(); |
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// MongoDB columns are alway nullable |
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if ($conn->getConfig()['driver'] === 'mongodb') { |
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return true; |
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} |
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try { |
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// check if the column exists in the database |
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$column = $conn->getDoctrineColumn($table, $column_name); |
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// check for NOT NULL |
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$notNull = $column->getNotnull(); |
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// return the value of nullable (aka the inverse of NOT NULL) |
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return ! $notNull; |
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} catch (\Exception $e) { |
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return true; |
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} |
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} |
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/* |
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|-------------------------------------------------------------------------- |
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| Methods for Fake Fields functionality (used in PageManager). |
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|-------------------------------------------------------------------------- |
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*/ |
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/** |
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* Add fake fields as regular attributes, even though they are stored as JSON. |
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* |
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* @param array $columns - the database columns that contain the JSONs |
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*/ |
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public function addFakes($columns = ['extras']) |
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{ |
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foreach ($columns as $key => $column) { |
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if (! isset($this->attributes[$column])) { |
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continue; |
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} |
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$column_contents = $this->{$column}; |
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if ($this->shouldDecodeFake($column)) { |
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$column_contents = json_decode($column_contents); |
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} |
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if ((is_array($column_contents) || is_object($column_contents) || $column_contents instanceof Traversable)) { |
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foreach ($column_contents as $fake_field_name => $fake_field_value) { |
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$this->setAttribute($fake_field_name, $fake_field_value); |
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} |
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} |
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} |
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} |
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/** |
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* Return the entity with fake fields as attributes. |
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* |
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* @param array $columns - the database columns that contain the JSONs |
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* |
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* @return Model |
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*/ |
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public function withFakes($columns = []) |
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{ |
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$model = '\\'.get_class($this); |
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$columnCount = ((is_array($columns) || $columns instanceof Countable) ? count($columns) : 0); |
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if ($columnCount == 0) { |
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$columns = (property_exists($model, 'fakeColumns')) ? $this->fakeColumns : ['extras']; |
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} |
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$this->addFakes($columns); |
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return $this; |
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} |
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/** |
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* Determine if this fake column should be json_decoded. |
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* |
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* @param $column string fake column name |
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* |
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* @return bool |
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*/ |
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public function shouldDecodeFake($column) |
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{ |
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return ! in_array($column, array_keys($this->casts)); |
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} |
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/** |
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* Determine if this fake column should get json_encoded or not. |
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* |
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* @param $column string fake column name |
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* |
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* @return bool |
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*/ |
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public function shouldEncodeFake($column) |
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{ |
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return ! in_array($column, array_keys($this->casts)); |
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} |
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/* |
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|-------------------------------------------------------------------------- |
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| Methods for storing uploaded files (used in CRUD). |
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|-------------------------------------------------------------------------- |
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*/ |
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/** |
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* Handle file upload and DB storage for a file: |
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* - on CREATE |
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* - stores the file at the destination path |
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* - generates a name |
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* - stores the full path in the DB; |
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* - on UPDATE |
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* - if the value is null, deletes the file and sets null in the DB |
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* - if the value is different, stores the different file and updates DB value. |
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* |
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* @param string $value Value for that column sent from the input. |
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* @param string $attribute_name Model attribute name (and column in the db). |
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* @param string $disk Filesystem disk used to store files. |
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* @param string $destination_path Path in disk where to store the files. |
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*/ |
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public function uploadFileToDisk($value, $attribute_name, $disk, $destination_path) |
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{ |
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// if a new file is uploaded, delete the file from the disk |
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View Code Duplication |
if (request()->hasFile($attribute_name) && |
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$this->{$attribute_name} && |
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$this->{$attribute_name} != null) { |
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\Storage::disk($disk)->delete($this->{$attribute_name}); |
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$this->attributes[$attribute_name] = null; |
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} |
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// if the file input is empty, delete the file from the disk |
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View Code Duplication |
if (is_null($value) && $this->{$attribute_name} != null) { |
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\Storage::disk($disk)->delete($this->{$attribute_name}); |
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$this->attributes[$attribute_name] = null; |
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} |
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// if a new file is uploaded, store it on disk and its filename in the database |
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View Code Duplication |
if (request()->hasFile($attribute_name) && request()->file($attribute_name)->isValid()) { |
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// 1. Generate a new file name |
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$file = request()->file($attribute_name); |
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$new_file_name = md5($file->getClientOriginalName().random_int(1, 9999).time()).'.'.$file->getClientOriginalExtension(); |
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// 2. Move the new file to the correct path |
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$file_path = $file->storeAs($destination_path, $new_file_name, $disk); |
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// 3. Save the complete path to the database |
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$this->attributes[$attribute_name] = $file_path; |
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} |
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} |
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/** |
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* Handle multiple file upload and DB storage: |
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* - if files are sent |
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* - stores the files at the destination path |
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* - generates random names |
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* - stores the full path in the DB, as JSON array; |
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* - if a hidden input is sent to clear one or more files |
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* - deletes the file |
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* - removes that file from the DB. |
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* |
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* @param string $value Value for that column sent from the input. |
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* @param string $attribute_name Model attribute name (and column in the db). |
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* @param string $disk Filesystem disk used to store files. |
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* @param string $destination_path Path in disk where to store the files. |
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*/ |
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public function uploadMultipleFilesToDisk($value, $attribute_name, $disk, $destination_path) |
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{ |
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if (! is_array($this->{$attribute_name})) { |
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$attribute_value = json_decode($this->{$attribute_name}, true) ?? []; |
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} else { |
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$attribute_value = $this->{$attribute_name}; |
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} |
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$files_to_clear = request()->get('clear_'.$attribute_name); |
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// if a file has been marked for removal, |
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// delete it from the disk and from the db |
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if ($files_to_clear) { |
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foreach ($files_to_clear as $key => $filename) { |
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\Storage::disk($disk)->delete($filename); |
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$attribute_value = array_where($attribute_value, function ($value, $key) use ($filename) { |
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return $value != $filename; |
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}); |
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} |
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} |
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// if a new file is uploaded, store it on disk and its filename in the database |
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View Code Duplication |
if (request()->hasFile($attribute_name)) { |
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foreach (request()->file($attribute_name) as $file) { |
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if ($file->isValid()) { |
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// 1. Generate a new file name |
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$new_file_name = md5($file->getClientOriginalName().random_int(1, 9999).time()).'.'.$file->getClientOriginalExtension(); |
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// 2. Move the new file to the correct path |
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$file_path = $file->storeAs($destination_path, $new_file_name, $disk); |
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// 3. Add the public path to the database |
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$attribute_value[] = $file_path; |
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} |
|
312
|
|
|
} |
|
313
|
|
|
} |
|
314
|
|
|
|
|
315
|
|
|
$this->attributes[$attribute_name] = json_encode($attribute_value); |
|
316
|
|
|
} |
|
317
|
|
|
|
|
318
|
|
|
/* |
|
319
|
|
|
|-------------------------------------------------------------------------- |
|
320
|
|
|
| Methods for working with translatable models. |
|
321
|
|
|
|-------------------------------------------------------------------------- |
|
322
|
|
|
*/ |
|
323
|
|
|
|
|
324
|
|
|
/** |
|
325
|
|
|
* Get the attributes that were casted in the model. |
|
326
|
|
|
* Used for translations because Spatie/Laravel-Translatable |
|
327
|
|
|
* overwrites the getCasts() method. |
|
328
|
|
|
* |
|
329
|
|
|
* @return self |
|
330
|
|
|
*/ |
|
331
|
|
|
public function getCastedAttributes() |
|
332
|
|
|
{ |
|
333
|
|
|
return parent::getCasts(); |
|
|
|
|
|
|
334
|
|
|
} |
|
335
|
|
|
|
|
336
|
|
|
/** |
|
337
|
|
|
* Check if a model is translatable. |
|
338
|
|
|
* All translation adaptors must have the translationEnabledForModel() method. |
|
339
|
|
|
* |
|
340
|
|
|
* @return bool |
|
341
|
|
|
*/ |
|
342
|
|
|
public function translationEnabled() |
|
343
|
|
|
{ |
|
344
|
|
|
if (method_exists($this, 'translationEnabledForModel')) { |
|
345
|
|
|
return $this->translationEnabledForModel(); |
|
|
|
|
|
|
346
|
|
|
} |
|
347
|
|
|
|
|
348
|
|
|
return false; |
|
349
|
|
|
} |
|
350
|
|
|
} |
|
351
|
|
|
|
This check looks for methods that are used by a trait but not required by it.
To illustrate, let’s look at the following code example
The trait
Idableprovides a methodequalsIdthat in turn relies on the methodgetId(). If this method does not exist on a class mixing in this trait, the method will fail.Adding the
getId()as an abstract method to the trait will make sure it is available.